Improvement in heading-tools for screws



N4 PETERS. PHOTO LTHGGRAPMER WASHINGTON D c UNITED STATES PATENT OEEICEo .CHARLES E. PHILLIPS, OF ABINGTON, MASSACHUSETTS.

IMPROVEMENT IN HEADING-TOOLS FOR SCREWS.

Specification forming part of Letters Patent No. 37,703, dated February 17, 1863.

To all whom it may concern Be it known that I, CHARLES E. PHILLIPS, of Abington, in the county of Plymouth and State of Massachusetts, have invented a new and Improved Heading-Tool for Screws, &c.; and I do here-by declare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming a part ot this specitication, in whieh- Figure l represents a longitudinal vertical section of my invention. Fig. 2 is a front elevation of the same. Fig. 3 is a side elevation of a screw-blank headed by my tool.

Similar letters ot' reference iu the three views indicate corresponding parts.

The invention consists in the employment, for the purpose of slotting-and forming` the heads of screw-blanks, of a tool made of two jaws, provided in one end with a cavity to tit to the desired heads, and held together by asuitable screw-clamp, in combination with an adjustable slotting tongue or blade, in such a manner that the same tool which forms the head forms at the same time the slot in onel below, and that the slottingblade can be adjusted to suit screw-heads ot'diiierent sizes and slots of ditt'erent depths. and that by removing the slot'ting-tongue the cavity of the heading-tool can be polished, so that the same produces well finished heads.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation with reference to the drawings.

My heading-tool A consists of two jaws, B C, which are secured together by means of a screw-clamp, D. The jaw B is provided with a shoulder, a, the upper surface of which is flush with the upper surface of the jaw C, when the two jaws are put together, and steady-pins b, inserted into the inner surface ot' the jaw C, and fitting into suitable sockets on the jaw B, serve to retain the two jaws in the proper relation to each other. Between the two jaws B (l a recess, c, is formed to receive and guide the slotting-blade D. To the inner end of this blade a round pin, d, is secured, which fits into a corresponding socket,

c, formed between the two jaws, and a screw, f, which passes through the shoulder ci of the jaw B, serves to adjust the blade D. Said Screw acts on the end of the pin d, and by turning it in theproper direction the blade D is pushed out flush with the end of the tocl. This end is provided with a cavity, g, corresponding in size to the heads of the screwblanks to be produced. In order to produce well-inished heads, it is indispensable that this cavity shall be polished. It' the slottingblade is rigid with thejaws, the operation of polishing cannot be accomplishen, whereas with my tool the blade can be removed and replaced by a piece of sheet metal, the end ot' which corresponds in shape to the inner sur face of the cavity g, and in this state the cavity can be polished the same as itl it. were cut intoa solid piece of steel. After the polishing operation is accomplished the slotting-blade is replaced between the jaws, and the tool is ready for use.

My tool is secured in a lever or fastened lto any other suitable part of a screw-blank niachine, which is pressed against the head of the screw-blank while the body of the screwblank is secured between the dies through which it is formed. Simultaneously, when the head is formed, the blade D, by coming in contact with the face ot' the head, makes an impression or slot in it, as clearly shown in Fig. 3 of the drawings. If the end ot' the blade wears off, it can be easily sharpened and adjusted to the desired position by the screw j', and by means of this screw the depth ot' the impression or slot in the head of the blank can be regulated.

Having thus fully described 'my invention, what I claim as new, and desire to secure by Letters Patent, is-

The arrangement of the adjustable and removable blade D, in combination with the jaws B C, constructed and operating substantially as herein described, for the purpose specified.

CHARLES E. PHILLIPS.

Witnesses:

CAROLINE H. WHITMAN, J ARED WHITMAN. 

